Brake-shoe and back therefor.



FITZ WILLIAM SARGENT.

BRAKE SHOE AND BACK THEREFOR.

APPLICATION FILED SEPT. 0, 1013.

1,120,089. Patented Dec. 8, 1914.

2 SHEETS-SHEET 1.

test: Inventor: M by W Atty FITZ WI AM SARGENT.

BR KB QHO LLI A E AND BACK THEREFOR. APPLICATION r Patented Dec. 8, 1914.

2 SHEETS-SHEET 2.

1 Inventor: 152 (Q g-- /wqwg UNITED STATES PATENT OFFICE.

FITZ WILLIAM SARGENT, OF MAHWAH, NEW JERSEY, ASSIGNOR TO AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF MAHWAH, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BRAKE-SHOE AND BACK THEREFOR Patented Dec. 8, 191.4.

Application filed September 9, 1913. Serial No. 788,848.

To alt tU/tO/lt it may concern.

Be it known that 1, Frrz WILLIAM Sancexr. a citizen of the United States, and a resident of Mahwah, in the county of Bergen and State of New Jersey, have made and invented certain new and useful Improvements in Brake-Shoes and Backs Therefor, of which the following is a specification.

My invention relates to brake shoes designed for use upon railroad cars and locomotives, the object thereof being to provide a shoe having an improved wrought metal strengthening back embedded in its rear surface as the same is formed,-and in which shoe increased strength is secured at the key lug.

My invention includes both the shoe and the improved wrought metal back therefor, and, while the preferred embodiment of my invention is illustrated in the drawings accompanying and forming a part of this application, it will be understood that the same may be embodied in such other specific forms of shoe and back as will be obvious to those skilled in the art to which my invention relates.

In the drawings :Figure .1 is a view showing my improved shoe in perspective: Fig. 2 is a view showing a section of the shoe upon a central longitudinally extending plane; Fig. 3 is a view showing one form of my improved brake shoe back in perspective: Fig. 4 is a similar view showing another form of back; Fig. 5 is a view showing a section of a shoe upon a central longitlulinal plane and equipped with the form of back shown in Fig. 4: Flg. (3 1s a view showing another form of back in perspective: and, Fig. 7 is a view showing a section upon a central longitudinal plane of a shoe equipped with the form of back shown in Fig. 6.

In the drawings. and referring first to Fig. 3. wherein one form of my improved brake shoe back is illustrated, the same is made from a blank cut from a plate or strip of wrought iron or mild steel of approximately {i of an inch in thickness, the blank being originally somewhat longer than the finished back 3. The blank is commonly provided with one or more openings 9 to thereby provide :for a firm anchorage between the brake shoe back and the body of the shoe in which it is embedded, and with other openings which register with one another in the attaching lug of the finished back. in order to provide a passage way 10 through which a securing key may extend, and whereby the shoe may be held in place upon a suitable brake head or equivalent support.

The strip of metal or blank from which the back is formed is bent or folded, commonly at its middle portion, to thereby provide an upwardly extending attaching lug 11 the two vertical portions 12 of the fold bclng brought into contact and permanently connected with one another, preferably by welding them together along a portion 61* the area of contact between the two. In practice it will be sullicient to weld these portions together at their lower ends only, as indicated at 13. altl'iough the weld will commonly extend upward and throughout a greater or less extent of the area of contact between the vertical portions 12. While the upwardly extending portions 1'2 are preferably secured together by welding. as above explained. it will be understood that they may be secured together in other ways as. for example. by brazing, it being merely necessary that they be permanently connected with one another for the purpose hereinafter explained.

In the form of back shown in Fig. 4-. two separate attaching lugs H are provided by folding the plate from which the wrought metal back is formed, the upwardly extending portions 15 of both the lugs being sooured together throughout a greater or less extent of the area of contact in the same manner as hereinbefore explained. The lugs 14: are provided with openings 16 through which a securing key may extend, as above explained, these openings being preferably first formed in the blank from which the back is'made. their location in the blank being such that when the same is folded to form the lugs the openings will register with one another. It will; however, be understood that the blank from which the wrought metal back is formed may be made without openings for the securing key, in which case the openings will be formed in the upwardly extending lug after the blank has been folded.

In the form of my invention shown in Fig. 4 the upwardly extending lugs 14 are spaced apart from one another. I may, however, provide the back. with an upwardly extending lug made up of more than two upwardly extending portions in contact with one another, as shown in Fig. 6, wherein the upwardly extending attaching lug 17 is shown as made up of three separate folds in contact with one another, the vertically extending portions thereof being permanently connected with one another, as by welding them together at their-lower ends, as shown at 18. The lug 17 will be provided with an opening 19 through which a securing key may extend; the same being provided either by means of openings in the blank so located as to register after the blank-has been folded to form the lug, or by forming the opening in the lug after it has been produced by folding the back, as above explained.

In making a shoe equipped with my improved back, the latter is placed in a suit ablemold in which the body portion 20, Figs. 1 and 2, is cast, the back becoming embedded in the rear surface of the shoe, as will be understood. Fig. 5 shows the form of back illustrated in Fig. 4:, embedded in the rear surface or back of the cast metal body 21 of a shoe, while Fig. 7 shows the form of brake shoe back illustrated in Fig. 6, embedded in the rear'surface of the body portion 22.

The attaching lug formed as above explained may be strengthened by embedding the same in cast metal as the shoe is formed, as illustrated in Figs. 1 and 2, wherein the reference numeral 23 designates a lug formed upon the rear surface of the body portion 20 of the shoe, and in which lug the attaching lug 11 of the back is embedded. The attaching lug of the shoe is thereby materially strengthened and the lug of the back protected from wear by the central thrust absorbing lugs of the brake head. The attaching lugs 14 and 17 of the forms of back shown in Figs. 4 and 6 may be embedded in cast metal as the body portion is cast upon them, although in the forms of my invention shown in Figs. 5 and 7 the lugs of the back are not embedded in the cast metal of the body portion of the shoe.

All the forms of my improved brake shoe will be provided with central and side lugs 24, 25 at their ends which lugs are engaged by the end lugs of the brake head as is common in brake shoe construction.

In view of the premises it will be appreciated that I provide a back for a brake shoe formed from a continuous strip or plate of wrought metal folded to provide an upwardly extending attaching lug, but in which the vertical portions of the lug in contact with one another are permanently connected, so that the portion of the back 1,120,ose

.which is embedded in the rear surface or back of the brake shoe is in efi'ect a continuous strip of metal. llt, therefore, follows that the portions .12 of the lug (Fig. 3)., and the similar portions shown in the other figures, cannot separate or pull apart should the shoe crack at its middle portion, or in the vicinity of the attaching lug. Conversely, the tendency of the body portion of the shoe to break or crack at its middle portion is reduced, because of the fact that the metal of the back is continuous, or in effect continuous, throughout the entire length ofthe shoe, and is not interrupted at the key lug as would be the case if the sides 12 of the lug were not permanently connected.

Having thus described and explained my invention, ll claim and desire to secure by Letters Patent:

1. A. brake shoe back provided with a plurality of folds extending upwardly and transversely across the same, said folds being welded together, forming a key lug.

2. A brake shoe back having an upwardly extending attaching lug formed of a plurality of thicknesses of the metal of said back in contact with one another and welded together.

3. An integral brake shoe back bent to provide an upwardly extending fold intermediate its ends, the layers of said fold being welded together at their lower ends.

4. An integral brake shoe back formed from wrought metal and bent to provide an upwardly extending fold intermediate its ends, the layers of said fold being welded together and provided with openings which register with one another.

5. A brake shoe comprising a cast metal body portion and a back embedded in the rear face of said body portion, said back' having an upwardly extending attaching lug formed of a plurality of thicknesses of the metal of said back in contact with-one another and welded together at their lower ends.

6. A brake shoe comprising a cast metal 'body portion, and a wrou ht metal back embedded in the rear face 0 said body por tion,..said back being bent to provide an upwardly extending fold intermediate its ends, the layers of said fold beinggwelded together at their lower ends, and provided with openings which register with one an other.

7. A. brake shoe comprising a cast metal body portion, and a wrought metal back embedded in the'rear face of said body portion; said back having an upwardly extending attaching lug formed of a plurality of thicknesses of the metal of said back in contact with one another and welded together at their lower ends; said brake shoe having an upwardly extending cast metal key lug upon its rear face which embeds and reinforces the lug aforesaid of said wrou ht metal back.

8. brake shoe comprising a cast metal body portion, and a wrought metal back embedded in the rear face of said body portion; said back bein bent to provide an 11 wardly extending f0 d intermediate its en s, the layers of said fold being welded together at their lower ends and provided with openings which register with one another; said brake shoe having an upwardly extending cast metal key lug upon its rear face WhlCh embeds and reinforces the lug aforesaid of said wrought metal back.

Signed at, Mahwah, township of Hohokus, in the county of Bergen and State'of' New Jersey, this 6th day of September A. D. 1913.

FITZ WILLIAM SARGENT.

Witnesses:

FRANK Osnonn, R. O. DuBols. 

